404The role of the page

1, to avoid dead links

Website Settings404After the page, if the website appears dead links, the search engine spider crawling this kind of URL gets404”Status response, knowing that the URL has expired, stops indexing the web page, and feeds back to the data center to delete the web page represented by the URL from the index database. Avoid dead links affecting the website's inclusion.

2, to improve user experience

404Page usually refers to the user visiting a non-existent or deleted page on the website, the server returns404Error page, informing the browser that the requested page does not exist or the link is incorrect, while guiding the user to use other pages of the website instead of closing the window and leaving, eliminating the user's frustration.

3, to avoid a decrease in trust

Search engines identify the status of web pages through HTTP status codes. When a search engine gets an incorrect link, the website should return404Status code, telling the search engine to abandon the indexing of this link. While if the return200 or302Status code, the search engine will create an index for this link, which leads to a large number of different links pointing to the same page content. As a result, the search engine's trust in the website is greatly reduced. Many websites have this problem:404The page returns200 or302Status code instead of404Status code.

4, to avoid punishment

Some websites due to the application of some incorrect server configurations, resulting in the return of200 status code or302Status codes, although these status codes do not affect users visiting the website, they may mislead search engines and make search engines think that this page is a valid page, thus crawling it. If404Too many pages can lead to a large number of duplicate pages, which may be penalized by search engines for cheating.